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Update Question 15.1:

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- Fix broken paragraphs
- Refine the grep(1) command
- Add some fresh output for grep(1)
- Capitalize IRQ
- Add non-breakeable spaces for better rendering

Reviewed by:  trhodes
Approved by:  gabor
This commit is contained in:
Gabor Pali 2008-07-05 02:40:54 +00:00
parent 5b60e11223
commit cf4c071c46
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=32450
1 changed files with 8 additions and 9 deletions
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en_US.ISO8859-1/books/faq/book.sgml
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@ -9393,29 +9393,28 @@ ATDT1234567</programlisting>
<para>As the FreeBSD kernel boots, it will probe for the serial <para>As the FreeBSD kernel boots, it will probe for the serial
ports in your system for which the kernel was configured. ports in your system for which the kernel was configured.
You can either watch your system closely for the messages it You can either watch your system closely for the messages it
prints or run the command</para> prints or run this command after your system is up and
running:</para>
<screen>&prompt.user; <userinput>dmesg | grep sio</userinput></screen> <screen>&prompt.user; <userinput>dmesg | grep -E "^sio[0-9]"</userinput></screen>
<para>after your system is up and running.</para>
<para>Here is some example output from the above command:</para> <para>Here is some example output from the above command:</para>
<programlisting>sio0 at 0x3f8-0x3ff irq 4 on isa <programlisting>sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A</programlisting> sio1: type 16550A</programlisting>
<para>This shows two serial ports. The first is on irq 4, is <para>This shows two serial ports. The first is on IRQ&nbsp;4, is
using port address <literal>0x3f8</literal>, and has a using port address <literal>0x3f8</literal>, and has a
16550A-type UART chip. The second uses the same kind of chip 16550A-type UART chip. The second uses the same kind of chip
but is on irq 3 and is at port address <literal>0x2f8</literal>. but is on IRQ&nbsp;3 and is at port address <literal>0x2f8</literal>.
Internal modem cards are treated just like serial ports &mdash; except Internal modem cards are treated just like serial ports &mdash; except
that they always have a modem <quote>attached</quote> to the that they always have a modem <quote>attached</quote> to the
port.</para> port.</para>
<para>The <filename>GENERIC</filename> kernel includes support <para>The <filename>GENERIC</filename> kernel includes support
for two serial ports using the same irq and port address for two serial ports using the same IRQ and port address
settings in the above example. If these settings are not settings in the above example. If these settings are not
right for your system, or if you have added modem cards or have right for your system, or if you have added modem cards or have
more serial ports than your kernel is configured for, just more serial ports than your kernel is configured for, just